My custom block model doesn't appear

I am making a block so that it has scaffolding-looking block, or that instead of 2D legs of the scaffolding, they are 3D. I used blockbench to create it and exported it had json and obj, like Mcreator said so. When using the json. version, it has no texture. When using the obj. version, it had a texture but was invisible. Is there a way to fix this.